Spectrally filtered lens producing plural f-numbers with differe

Details Spectrally filtered lens producing plural f-numbers with differe Spectrally filtered lens producing plural f-numbers with differe

1984-12-20

1987-08-18

Laroche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350317, H01J 516, G02B 522

Patent

active

046879269

ABSTRACT:
A photoresponsive apparatus is disclosed which includes a photoresponsive device that provides an output or response having a characteristic which varies as a function of the radiant power and wavelength incident on a photoresponsive surface thereof. Included is a spectral filtering means associated with an optical assembly so as to provide the assembly with different f-number zones for each of the respectively different proportionalities of wavelengths such that the spectral composition of incident radiation reaching the surface is controlled by the spectral filtering means to effect a desired change in the response of the photoresponsive device.

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"CCD Imaging" Electro 77 Professional Program, Apr. 19-21, 1977.

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